Cerium Phosphate-Cerium Oxide Heterogeneous Composite Nanozymes with Enhanced Peroxidase-Like Biomimetic Activity for Glucose and Hydrogen Peroxide Sensing.

In the present work, we focus on the development of CePO-CeO composite nanorods with peroxidase mimetic activity for the sensitive detection of hydrogen peroxide and glucose. The Ce/PO molar ratio (CP10:1, CP5:1, CP2:1) in the hydrothermal reaction controlled the formation of pure CePO, CePO-CeO composite nanozymes with different percentages of CeO, and its crystal structure. A higher Ce/PO molar ratio (CP10:1 or CP5:1) was required to obtain CePO-CeO composite nanostructure, while a lower Ce/PO molar (CP2:1) ratio was sufficient to fabricate pure CePO nanorods.